Another in the series of My Bookshelf

I never got chance to take a new pic today so I am publishing another in the series about my shelves.
This is a particularly poignant shelf as it is the resting place for the device that is the badge of office for my Dad.
It is his trusty AVOmeter, named after the amps, volts and ohms it measured. It is a vintage piece now, but in its day was the pinnacle of versatile measurement, even now the digital counterparts still try to replicate its dynamic analogue function.
I love my Dad, he was the best in the word - as I hope yours is too.